Automatic cut-off for gas-stoves.



PATENTBD MAY 19,

F. c. MILLER. AUTOMATIC GUT-OFF 'FOR GAS STOVES.

APPLICATION FILED JULY 15, 1901.

N0 MODEL.

ORR|S Pawn; co, mm'du'mm WASHINGTON uv c.

UNITED STATES Patented May "19, 1903.

PATE T OFFICE.

AUTOMATIC CUT-OFF FO'R GAS-STONES.

SPEGIFIGATION Yforming part of Letters Patent N 0. 728,267, dated May 19, 1903.

Application filed July 15, 1901.

To ctZZ whom it may concerjm 1 Be it known that I, FREDERICK O. MILLER,

a citizen of the United States, residing at Newport, in the county'of Campbell and State of Kentucky, have invented certain new and useful Improvements in Automatic Out-OHS for Gas-Stoves, of which the following is a specification. i i

The object of my invention is to automatically light the burner or burners in a gas range or stove by the act of putting on cooking utensils or other articles to he'heated and-to automaticallycut off the gas when the utensil is taken E.

The features of myinvention are more fully set forth in the description of the accompanying drawings, forming a part of this specification,- in which K Figure 1 is a top plan view of a section of a burner base-plate of a range with my improvement applied thereto. Fig. 2 is a sectional elevation on line a; m, Fig. 1.. Fig. 3 is a transverse horizontal section through the valves.

A represents a section of the top p ate of a gas stove or, range.

B represents the burner-opening. 0 represents the rim surrounding the open- 1 ing on which the utensil rests.

D represents the gas-supply pipe. I E E represent branch burner-pipes tapping the main supply-pipe.

G represents a plugvalve tapping the valvestock H and controlling the supply-passage way a, which supplies the pilot-pipe or conduit b and also the main conduit or passage 0, leading to the main body of the burner I.

' The pilot-pipe b is projected forward and ter- K represents the stem of the lever, which projects upwardly above the burner-opening $e1-ia1No. 68,334. (No model) B in the rim 0. fThis'projecting end is thus sure to be engaged with the utensil set upon the rim 0, so that it is depressed'far enough.

to lift the valve J above the passages 01 and 0, allowing a flow of gas to the burner. The innor end of the stem K isforked or bifurcated valve from falling freelyor rising, and when this occ'urs'if the valve plug is simply lifted out and wiped off and then returned the action will again be entirely accurate. This valve being seated by gravity allows it to reciprocate in a vertical plane.

ver-stem may be employed in lieu of the form here shown.

It will be observed that the passage-way a is placed in a direct line to the passage-way 'c,*lea;din'gto the main burner. "is provided with a straightway passage g,

The valve G.

preferablypierced"diametricallythrough the valvepl ug, which valveway when turned in the position shown in Fig.- 3. cuts off the supply of'gas to the burner'. 1

f represents a by p'assage' leading from the passage 01. and is preferably formed by cut-,

ting away the periphery of the valve-plug at this point.

it represents the stem of the valve-plug G and when in the position shown in Figs. 1 and 3 gas is'being supplied to the pilot-pipe b. When it is desired. to cut 06 the supply of gas to the pilot, the stem his turned in the opposite direction to the'position shown in dotted lines, Fig. 1, when the supply of gas is entirely cutoff from both pipes.

Mode of operation: When it is desired to use the range, the stem of.:valve Gisturnediin the position shown in full lines, Fig. 1, and

the gas'is lighted" at theendof the pilot-pipe b. When a utensil is placed upon the rim C of that "burner, it depresses the lever-stem K, which raises the valve J and allows a supply of gas to pass to the main burner, where it is This is very useful, as the Any other form of loose connection of the valve with the leaffecting the pilot-light.

In the rear burner, as shown in Fig. l, the semi-automatic valve J is placed at the rear A end of the supply-pipe E, and the plug-valve is placed at the front end, so as to be convenient to the operator.

The construction herein shown and described is very simple and presents many advantages.

First. The semi-automatic valveJ is of simple construction, can be readily lifted out and cleaned, and is positively operative, first, by the weight of the utensil to open the valve, and, second, by its own weight to positively close the same the inst-ant the utensil is lifted olf of the range or stove.

Second. The main valve is adapted to either independently or simultaneously regulate and control the supply of gas to both the main and pilot pipes and altogether independent of the regulating-valve in the main conduit between the supply-valve and the burner.

It will be observed that the valve G may be turned so as to regulate the supply to passage 0 Without affecting the supply to the pilotlight, which continues until the valve is turned to close the passage a. This is useful, for the reason that in igniting the burner the gas frequently lights back in the main conduit. With my attachment the supply-valve may be turned to shut off the gas from the main conduit while the pilot-light remains burning, thus extinguishing the gas burning back in the main conduit and when the main valve is turned on again insuring a relighting of the burner from the pilot-light without the necessity of igniting another match.

Having described my invention, I claim-- 1. In a gas-burner, a main and a pilot-light conduit, a valve-orifice in the main conduit, a piston-valve supported in said orifice by gravityin its normally closed position, a head on the upper end of said piston-valve enlarged relative to the size of the body of the piston-valve within the orifice, a lever having one end projected above the burner, the other end of said lever having a loop engaging under the enlarged head of the pistonvalve, said loop being of greater diameter than the diameter of the valve-stem and of less diameter than the said head, whereby when the lever is actuated the valve will be lifted, but permitting the piston-valve to be bodily withdrawn from its orifice independently of the position of the lever.

2. A gas-burner; a supply-pipe, a lever pivoted to the burner having one end projected above the same, a plug-valve seated in the supply-pipe by gravity, said plug-valve resting by gravity alone upon the opposite end of the said lever, whereby a vessel placed on the burner will lift the valve, but leaving the valve free to be bodily detached, substantially as specified.

3. A gas -burner, a supplypipe, a plugvalve seated by gravity therein a lever pivoted to the burner having one end projected above the same, the opposite end of said lever and the upper end of the plug-valve having looped engagement, whereby the lever will serve to lift the valve, but leaving the valve bodily detachable, substantially as specified.

In testimony whereof I have hereunto set my hand.

FREDERICK C. MILLER.

Witnesses:

OLIVER B. KAISER, EDWD. T. ALEXANDER. 

